被试品辐射发射试验点位对测试结果影响
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摘要
为提高试验精度,减小电磁兼容(EMC)半电波暗室中被试品(EUT)的电磁辐射发射试验点位对测试结果的影响,研究了不同试验点位对半电波暗室典型谐振频率电磁信号辐射发射的影响规律。采用几何光学、一致性绕射理论和多路径效应算法对不同试验点位,暗室典型谐振频率电磁信号的传输过程进行数学建模,剔除直射场强影响,综合考虑信号传输过程中产生的反射、折射、绕射和多径等电磁传播效应,给出了数学模型和计算公式。将数学传播模型与剔除直射场影响的试验实测模型计算结果进行比对,验证了数学模型的有效性。该研究为修正被试品在暗室内不同点位进行辐射发射试验的测试结果提供了理论依据,有助于提高被试品电磁辐射发射试验的测试精度。
In order to improve the measurement precision and reduce the influence of equipment under test( EUT) electromagnetic radiated emission testing location on test results in electromagnetic capatibility( EMC) semi-anechoic chamber,this paper studies the influence law on electromagnetic signal radiation emission testing of semi-anechoic chamber typical resonance frequency for different testing locations of semi-anechoic chamber. The research is modeled,simulated and calculated by geometrical optics,consistency of diffraction theory and multipath effect algorithm. The math model and computational formulas are proposed,besides,the influence of direct field is eliminated in the math model. The electromagnetic propagation effects of reflection,refraction and multipath effect in the testing are comprehensively considered. The calculation results of math propagation model and actual testing model that eliminate the influence of direct field are compared. The results verify the effectiveness of math model. This research supplies theory basis for correcting the results of electromagnetic radiation emission testing in different positions of semi-anechoic chamber,which is also helpful to improving the measurement precision of electromagnetic radiation emission testing in semi-anechoic chamber.
In order to improve the measurement precision and reduce the influence of equipment under test( EUT) electromagnetic radiated emission testing location on test results in electromagnetic capatibility( EMC) semi-anechoic chamber,this paper studies the influence law on electromagnetic signal radiation emission testing of semi-anechoic chamber typical resonance frequency for different testing locations of semi-anechoic chamber. The research is modeled,simulated and calculated by geometrical optics,consistency of diffraction theory and multipath effect algorithm. The math model and computational formulas are proposed,besides,the influence of direct field is eliminated in the math model. The electromagnetic propagation effects of reflection,refraction and multipath effect in the testing are comprehensively considered. The calculation results of math propagation model and actual testing model that eliminate the influence of direct field are compared. The results verify the effectiveness of math model. This research supplies theory basis for correcting the results of electromagnetic radiation emission testing in different positions of semi-anechoic chamber,which is also helpful to improving the measurement precision of electromagnetic radiation emission testing in semi-anechoic chamber.
引文
[1]中国人民解放军总装备部电子信息基础部.军用设备和分系统电磁发射和敏感度要求与测量:GJB 151B—2013[S].北京:国防科学技术工业委员会,2013:59-65.Electronic Information Department of General Armament Department of the Chinese People’s Liberation Army.Requirements and measurement of electromagnetic emission and susceptibility for military equipment and subsystems:GJB 151B—2013[S].Beijing:Commission of Science Technology and Industry for National Defense of the PRC,2013:59-65(in Chinese).
[2]HENRY W O.Electromagnetic compatibility engineering[M].New York:Wiley,2009:116-148.
[3]马永光,陈海波,何国瑜.射频仿真暗室的静区分析[J].北京航空航天大学学报,2006,32(12):1431-1434.MA Y G,CHEN H B,HE G Y.Quiet zone analysis of a RF simulation anechoic chamber[J].Journal of Beijing University of Aeronautics and Astronautics,2006,32(12):1431-1434(in Chinese).
[4]SHINOZAKI A,SASAKI R,HARIYA E.Performance comparison of 10 m semi-anechoic chamber for EMI measurement using CISPR16-1:Anechoic chamber performance verification experiment report using CALT theoretical value[J].IEICE Technical Report Electromagnetic Compatibility,2004,104:19-26.
[5]洪丽娜,樊友谊,郝晓军,等.吸波材料电参数改变对暗室静区性能的影响分析[J].电子测量技术,2010,33(8):121-124.HONG L N,FAN Y Y,HAO X J,et al.Analysis on the quiet zone performance due to degraded absorbers[J].Electronic Measurement Technology,2010,33(8):121-124(in Chinese).
[6]HAO X,LIU R,CHEN Y,et al.Calculation and optimization of quiet-zone in RF anechoic chamber[C]∥7th IEEE International Symposium on Antennas,Propagation&EM Theory,2006(ISAPE’06).Piscataway,NJ:IEEE Press,2006:1-3.
[7]SONG D A,FANG C,ZHANG Q,et al.The technologies for reducing quiet zone level of anechoic chamber[C]∥IEEE International Symposium on Signals Systems and Electronics(ISSSE),2010.Piscataway,NJ:IEEE Press,2010:1-4.
[8]CHANG D C,LIAO C H,WU C C.Compact antenna test range without reflector edge treatment and RF anechoic chamber[J].IEEE Antennas&Propagation Magazine,2004,46(4):27-37.
[9]SPANO I L,SULIS S,SERPI A,et al.EMC Characterization of implantable cardiac medical devices in an anechoic chamber[C]∥2014 IEEE International Symposium on Electromagnetic Compatibility(EMC Europe).Piscataway,NJ:IEEE Press,2014:872-877.
[10]KURIHARA H,SAITO T,SUZUKI Y,et al.Investigation on10 m semi anechoic chamber by using grid-ferrite and open-top hollow pyramidal EM wave absorber[J].IEICE Transactions on Electronics,2006,89(1):16-23.
[11]何洋,苏东林,李艳,等.一种电磁兼容测量天线系数温度误差修正方法[J].北京航空航天大学学报,2015,41(10):1821-1829.HE Y,SU D L,LI Y,et al,Method for EMC antenna factor temperature error correction[J].Journal of Beijing University of Aeronautics and Astronautics,2015,41(10):1821-1829(in Chinese).
[12]苏东林,戴飞,谢树果,等.天线系数的测试误差与NSA测试的改进[J].北京航空航天大学学报,2007,33(11):1291-1294.SU D L,DAI F,XIE S G,et al.Errors of antenna factor and improved method for NSA test[J].Journal of Beijing University of Aeronautics and Astronautics,2007,33(11):1291-1294(in Chinese).
[13]LIN M S,JI J M,HSU C I G,et al.Simulation and analysis of emc chambers by ray tracing method[C]∥IEEE International Symposium on Electromagnetic Compatibility,2007(EMC2007).Piscataway,NJ:IEEE Press,2007:1-4.
[14]MIGLIORE M D.Filtering environmental reflections in far-field antenna measurement in semi-anechoic chambers by an adaptive pattern strategy[J].IEEE Transactions on Antennas&Propagation,2004,52(4):1112-1115.
[15]吴良超,汪茂光.阻抗劈一致性绕射系数的一种简洁表达式[J].电波科学学报,1994(4):76-80.WU L C,WANG M G.A concise expression of uniform diffracted coefficient of an impedance wedge[J].Chinese Journal of Radio Science,1994(4):76-80(in Chinese).
[16]唐东,张麟兮,呼斌,等.基于距离差分法消除天线测试多径干扰[J].现代电子技术,2014(11):101-103.TANG D,ZHANG L X,HU B,et al.Elimination of multipath interference in antenna test based on distance difference method[J].Modern Electronics Technique,2014(11):101-103(in Chinese).
[17]CHUNG B K,CHUAH H T.Design and construction of a multipurpose wideband anechoic chamber[J].IEEE Antennas&Propagation Magazine,2003,45(6):41-47.
[18]HERRERA J F,MORENO P.Calculation of reflection losses in a small anechoic chamber[J].IEEE Latin America Transactions,2015,13(5):1258-1264.
[19]MUNTEANU I,KAKEROW R.Simulation methodology for the assessment of field uniformity in a large anechoic chamber[J].IEEE Transactions on Magnetics,2014,50(2):213-216.
[2]HENRY W O.Electromagnetic compatibility engineering[M].New York:Wiley,2009:116-148.
[3]马永光,陈海波,何国瑜.射频仿真暗室的静区分析[J].北京航空航天大学学报,2006,32(12):1431-1434.MA Y G,CHEN H B,HE G Y.Quiet zone analysis of a RF simulation anechoic chamber[J].Journal of Beijing University of Aeronautics and Astronautics,2006,32(12):1431-1434(in Chinese).
[4]SHINOZAKI A,SASAKI R,HARIYA E.Performance comparison of 10 m semi-anechoic chamber for EMI measurement using CISPR16-1:Anechoic chamber performance verification experiment report using CALT theoretical value[J].IEICE Technical Report Electromagnetic Compatibility,2004,104:19-26.
[5]洪丽娜,樊友谊,郝晓军,等.吸波材料电参数改变对暗室静区性能的影响分析[J].电子测量技术,2010,33(8):121-124.HONG L N,FAN Y Y,HAO X J,et al.Analysis on the quiet zone performance due to degraded absorbers[J].Electronic Measurement Technology,2010,33(8):121-124(in Chinese).
[6]HAO X,LIU R,CHEN Y,et al.Calculation and optimization of quiet-zone in RF anechoic chamber[C]∥7th IEEE International Symposium on Antennas,Propagation&EM Theory,2006(ISAPE’06).Piscataway,NJ:IEEE Press,2006:1-3.
[7]SONG D A,FANG C,ZHANG Q,et al.The technologies for reducing quiet zone level of anechoic chamber[C]∥IEEE International Symposium on Signals Systems and Electronics(ISSSE),2010.Piscataway,NJ:IEEE Press,2010:1-4.
[8]CHANG D C,LIAO C H,WU C C.Compact antenna test range without reflector edge treatment and RF anechoic chamber[J].IEEE Antennas&Propagation Magazine,2004,46(4):27-37.
[9]SPANO I L,SULIS S,SERPI A,et al.EMC Characterization of implantable cardiac medical devices in an anechoic chamber[C]∥2014 IEEE International Symposium on Electromagnetic Compatibility(EMC Europe).Piscataway,NJ:IEEE Press,2014:872-877.
[10]KURIHARA H,SAITO T,SUZUKI Y,et al.Investigation on10 m semi anechoic chamber by using grid-ferrite and open-top hollow pyramidal EM wave absorber[J].IEICE Transactions on Electronics,2006,89(1):16-23.
[11]何洋,苏东林,李艳,等.一种电磁兼容测量天线系数温度误差修正方法[J].北京航空航天大学学报,2015,41(10):1821-1829.HE Y,SU D L,LI Y,et al,Method for EMC antenna factor temperature error correction[J].Journal of Beijing University of Aeronautics and Astronautics,2015,41(10):1821-1829(in Chinese).
[12]苏东林,戴飞,谢树果,等.天线系数的测试误差与NSA测试的改进[J].北京航空航天大学学报,2007,33(11):1291-1294.SU D L,DAI F,XIE S G,et al.Errors of antenna factor and improved method for NSA test[J].Journal of Beijing University of Aeronautics and Astronautics,2007,33(11):1291-1294(in Chinese).
[13]LIN M S,JI J M,HSU C I G,et al.Simulation and analysis of emc chambers by ray tracing method[C]∥IEEE International Symposium on Electromagnetic Compatibility,2007(EMC2007).Piscataway,NJ:IEEE Press,2007:1-4.
[14]MIGLIORE M D.Filtering environmental reflections in far-field antenna measurement in semi-anechoic chambers by an adaptive pattern strategy[J].IEEE Transactions on Antennas&Propagation,2004,52(4):1112-1115.
[15]吴良超,汪茂光.阻抗劈一致性绕射系数的一种简洁表达式[J].电波科学学报,1994(4):76-80.WU L C,WANG M G.A concise expression of uniform diffracted coefficient of an impedance wedge[J].Chinese Journal of Radio Science,1994(4):76-80(in Chinese).
[16]唐东,张麟兮,呼斌,等.基于距离差分法消除天线测试多径干扰[J].现代电子技术,2014(11):101-103.TANG D,ZHANG L X,HU B,et al.Elimination of multipath interference in antenna test based on distance difference method[J].Modern Electronics Technique,2014(11):101-103(in Chinese).
[17]CHUNG B K,CHUAH H T.Design and construction of a multipurpose wideband anechoic chamber[J].IEEE Antennas&Propagation Magazine,2003,45(6):41-47.
[18]HERRERA J F,MORENO P.Calculation of reflection losses in a small anechoic chamber[J].IEEE Latin America Transactions,2015,13(5):1258-1264.
[19]MUNTEANU I,KAKEROW R.Simulation methodology for the assessment of field uniformity in a large anechoic chamber[J].IEEE Transactions on Magnetics,2014,50(2):213-216.